20713089 has 32 divisors (see below), whose sum is σ = 30481920. Its totient is φ = 12460032.

The previous prime is 20713079. The next prime is 20713103. The reversal of 20713089 is 98031702.

It is a happy number.

It is not a de Polignac number, because 20713089 - 2⁴ = 20713073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20713019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 213489 + ... + 213585.

It is an arithmetic number, because the mean of its divisors is an integer number (952560).

Almost surely, 2^20713089 is an apocalyptic number.

It is an amenable number.

20713089 is a deficient number, since it is larger than the sum of its proper divisors (9768831).

20713089 is a wasteful number, since it uses less digits than its factorization.

20713089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 20713089 is about 4551.1634776176. The cubic root of 20713089 is about 274.6301982549.

The spelling of 20713089 in words is "twenty million, seven hundred thirteen thousand, eighty-nine".